when dis happens my rev feels like a pull back, drop of performance for 1 sec,,,, on dyno machine at each run, it always happens at dat region, thus im not able to pull above dat region, as da a/f ratio fluctuates up...
can someone teach me or help me on installing wira s.e bumper to wira sedan?? and the grill.. coz i install the grill, seen like "terkeluar" from the lamp..